Building Web Services with Java and SAP Web Application Server

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1 EUROPEAN SAP TECHNICAL EDUCATION CONFERENCE 2002 Web Services and Openness WORKSHOP Sept. 30 Oct. 2, 02 Bremen, Germany Building Web Services with Java and SAP Web Application Server Timm Falter, SAP AG Vladimir Savchenko, SAP AG

2 Learning Objectives As a result of this workshop, you will: understand the concepts of SAP s Web Service Infrastructure distinguish the different roles in Web Service development know which Web Service Tools to use in which role SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 2

3 Agenda Introduction Overview about the SAP Web Service Infrastructure Support of Web Service Providers Support of Web Service Consumers Summary SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 3

4 XML, WSDL, UDDI, SOAP and HTTP Service Discovery Service Publication Service Directory UDDI WSDL XML/ SOAP HTTP Service Requestor Service Invocation Service Provider SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 4

5 Agenda Introduction Overview about the SAP Web Service Infrastructure Support of Web Service Providers Support of Web Service Consumers Summary SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 5

6 Web Service within SAP Web Application Server The Web Service capability within SAP Web AS is the foundation for all mysap.com solutions a scalable, reliable Web application infrastructure that delivers high-performance Web Services offering Web Service functionality for the ABAP and J2EE personality with a common architecture allowing to expose existing functionality (BAPIs, RFMs, IDOCs, EJBs) as Web Service easily allowing to consume Web Service from any source SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 6

7 Benefits Web Service interfaces provide a virtual abstraction from the implementation layer Fully integrated into the well known and stable development environment Full fledged UDDI capabilities UDDI server implementation UDDI client functionality Standard compliant WSDL generation Support of client proxy generation for ABAP and J2EE Extensible SOAP Runtime Pluggable Features Security Transactions Protocols... SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 7

Providing Web services based on Open Standards UDDI

Server Development Environment Web Service

Service Configuration SOAP Processing Extensible

Protocols Web Service Interfaces RFM BAPI IDoc EJB

8 Providing Web services based on Open Standards UDDI WSDL Web Service Consumer SOAP SAP Web Application Server Development Environment Web Service Configuration UDDI Publishing WSDL Generation Web Service Configuration SOAP Processing Extensible Runtime Pluggable Features Security Transactions Protocols Web Service Interfaces RFM BAPI IDoc EJB Business Application SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 8

Consuming Web services based on Open Standards Business Application Development Environment Web Service Proxy Generation Proxy Configuration UDDI based Web Service discovery Web Service Proxies Proxy

9 Consuming Web services based on Open Standards Business Application Development Environment Web Service Proxy Generation Proxy Configuration UDDI based Web Service discovery Web Service Proxies Proxy Config. SOAP Processing Extensible runtime Pluggable features Security Transactions Protocols SAP Web Application Server SOAP WSDL UDDI Web Service Provider SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 9

10 SAP Web Services Infrastructure - Details - Designed according to the most important roles in Web Service development Supported roles on Provider-side Web Service Developer has knowledge about application logic implements the Web Service functionality describes the Web Service based on abstract features Web Service Configurator has knowledge about technical protocols assigns technical protocols to abstract features and configures them deploys Web Services on application server Supported roles on Consumer-side Web Service Client Developer SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 10

11 Agenda Introduction Overview about the SAP Web Service Infrastructure Support of Web Service Providers Support of Web Service Consumers Summary SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 11

12 Support for Web Service Developers (1) Background of a WS Developer knows/defines the application logic knows/defines the Web Service Interface which should be accessible for clients knows/defines the behavior of the Web Service e.g. Stateless/Stateful, Transactional behavior, security requirements, etc. does not need to have detailed knowledge about technical protocols which implement abstract behavior concrete application servers on which the Web Service will be running Defines Design-Time information of a Web Service SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 12

13 Support for Web Service Developers (2) - Tasks of a Web Service Developer - Implementation of business logic Supported by the standard IDE Takes place in Endpoint-specific standard Tools SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 13

14 Support for Web Service Developers (3) - Tasks of a Web Service Developer - Definition of Web Service Interface Web Service Interface = Interface visible to clients (via WSDL, UDDI, ) Supported by the Web Service Infrastructure via Virtual Interfaces A Virtual Interface provides abstraction from concrete implementation (=endpoint) Web Service client does not need to know if the Web Service is implemented as EJB, Java class, servlet, allows to publish a view on existing implementations as Web Service Interfaces renaming of parameters hiding of parameters definition of default values allows to define how the Web Service Interface is represented in the SOAP message Element vs. Attribute Namespaces SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 14

15 Demo Demo Virtual Interfaces SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 15

16 Virtual Interfaces (1) - Creation of a Virtual Interface - SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 16

17 Virtual Interfaces (1) - Creation of a Virtual Interface - SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 17

18 Virtual Interfaces (2) - Defining Web Service Methods - Hiding of methods SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 18

19 Virtual Interfaces (2) - Defining Web Service Methods - Renaming of methods Defining representation in SOAP message SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 19

20 Virtual Interfaces (3) - Defining Parameters - Renaming of parameters Datatype mapping Hiding of parameters Defintion of default values SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 20

21 Support for Web Service Developers (4) - Tasks of a Web Service Developer - Creation of Web Service Definition Web Service Definition = Assignment of behavior to a Web Service Interface via features Motivation a Web Service is not only described by its interface but also by its behavior with respect to stateless/stateful communication, transactional behavior, security requirements, Idea: describe this kind of behavior via abstract features leave it to the Web Service Configurator to assign technical protocols to these abstract features Example:» Feature: Stateful» Technical Protocols: Stateful via HTTP-Cookies, Stateful via URL-Extensions SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 21

22 Support for Web Service Developers (5) - Tasks of a Web Service Developer - Creation of Web Service Definition Benefits: The same Web Service definition can be deployed to various application servers which may differ in their technical capabilities Web Service Client implementations do not depend from technical server information Client proxies are generated based on implementation-independent Web Service definitions Technical details are configured separately in the Web Service Client Runtime SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 22

23 Support for Web Service Developers (6) - Tasks of a Web Service Developer - Creation of Web Service Definition Supported by the Web Service Infrastructure via Web Service Definition Editor UDDI Publication of Web Service Definitions WSDL Generation for Web Service Definitions SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 23

24 Demo Demo Web Service Definition SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 24

25 Web Service Definitions (1) - Creation of a Web Service Definition - SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 25

26 Web Service Definitions (2) - Overview about created Web Service Defintion - Underlying Virtual Interface SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 26

27 Web Service Definitions (3) - Definition of behavior via Feature Configuration - Select Feature SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 27

28 Web Service Definitions (3) - Definition of behavior via Feature Configuration - Specify property SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 28

29 Web Service Definitions (3) - Definition of behavior via Feature Configuration - Specify property value SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 29

30 Web Service Definitions (4) - Publish Web Service Definition to UDDI - Start publication of Web Service Definition into UDDI SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 30

31 Web Service Definitions (4) - Publish Web Service Definition to UDDI - URL to WSDL document of Web Service Definition trigger publication SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 31

32 Web Service Definitions (4) - Publish Web Service Definition to UDDI - Created tmodel key is managed as part of the Web Service Definition SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 32

33 Web Service Definitions (5) - WSDL Generation - URL to WSDL document of Web Service Definition SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 33

34 Support for Web Service Configurators (1) Background of a WS Configurator knows the technical protocols which implement the abstract features knows the System Landscape knows the Web Service capabilities of the single Application Servers Defines Runtime information of a Web Service SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 34

35 Support for Web Service Configurators (2) - Tasks of a Web Service Configurator - Technical configuration of a Web Service Definition Assignment of technical protocols to the abstract features based on the Web Service capabilities of the Application Server Configuration of additional Web Service Runtime features Logging, Tracing, Monitoring Security Roles Supported by the Web Service Infrastructure via Web Service Configuration Editor SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 35

36 Support for Web Service Configurators (3) - Tasks of a Web Service Configurator - Deployment of a Web Service Deployment of the Web Service archive to a specific application server Supported by Web Service Infrastructure via Web Service Deployment Wizard WSDL Generation for deployed Web Services SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 36

37 Demo Demo Web Service Deployment SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 37

38 Web Service Deployment (1) - Creation of Deployment Configuration - SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 38

39 Web Service Deployment (1) - Creation of Deployment Configuration - SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 39

40 Web Service Deployment (2) - Configuration of Deployment Options- SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 40

41 Agenda Introduction Overview about the SAP Web Service Infrastructure Support of Web Service Providers Support of Web Service Consumers Summary SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 41

42 Support for Web Service Consumers (1) Background of a Web Service Consumer implements the client application knows how to use the Web Service client proxy in the client application knows how to get the description of a Web Service (UDDI, WSDL, ) knows how to generate the Web Service client proxy SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 42

43 Support for Web Service Consumers (2) - Tasks of a Web Service Consumer - Retrieve description of Web Service Retrieval of URL of WSDL description either manually or using UDDI Browsing Supported by the Web Service Infrastructure via UDDI Client Browser SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 43

44 Support for Web Service Consumers (3) - Tasks of a Web Service Consumer - Generate Web Service Client Proxy Start proxy generator based on imported WSDL Document Supported by the Web Service Infrastructure via Web Service Proxy Generator Implementation of Client Application Usage of generated client proxies Supported by the standard Java IDE SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 44

45 Demo Demo Web Service Client Programming SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 45

46 Web Service Client Programming (1) -UDDI Browsing - Find published Web Service SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 46

47 Web Service Client Programming (1) -UDDI Browsing- Retrieved Service uuid:3d5e6483-d20e-11d6-9abf-0050da browse details of retrieved Web Service SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 47

uuid:3d5e6483-d20e-11d6-9abf-0050da428585 get

of Web Definition get URL Service to WSDL

48 Web Service Client Programming (1) -UDDI Browsing- Retrieved Service uuid:3d5e6483-d20e-11d6-9abf-0050da get reference to underlying Access Web URL Service of Web Definition get URL Service to WSDL description of Web Service SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 48

49 Web Service Client Programming (2) - Retrieve WSDL Description - SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 49

50 Summary Web Services technology is ready for use mysap Technology provides open integration that builds on Web Services SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 50

51 Further Information Public Web: WSDL 1.1: ( SOAP 1.1: ( UDDI Specifications ( SAP s UDDI Business Registry ( WS-I ( UBL OASIS Technical Committee ( SAP AG 2002, TechED_02 Bremen, Slot #, Speaker Name / 51

SAP NetWeaver Process Integration 7.1. SAP NetWeaver Regional Implementation Group SAP NetWeaver Product Management December 2007

SAP NetWeaver Process Integration 7.1 Providing Web Services in Java SAP NetWeaver Regional Implementation Group SAP NetWeaver Product Management December 2007 SAP NetWeaver Process Integration 7.1 1 Benefits